临盘油田大芦家地区临25-1断块新近系馆二上段精细油藏描述

发布时间：2018-05-01 09:14

本文选题：小层对比 + 沉积微相　；参考：《中国地质大学(北京)》2017年硕士论文

【摘要】：临25-1断块为临盘油田大芦家地区主力含油断块之一,现已步入后期高含水开发阶段,但仍有较大开发潜力,为进一步摸清剩余油分布规律和改善开发效果,针对本区馆二上段储层认识中所存在的地层对比方案不准确、缺乏详细的沉积微相研究、测井解释成果存在误差、储量失控等问题,我们需对本断块馆二上段油藏展开精细描述研究工作。本论文的油藏精细描述研究主要是以沉积学、油气田地下地质学为理论指导,以岩心、测井等资料为依据,结合临25-1断块馆二上段地层的区域沉积背景,进行了储层的精细对比研究工作,首先确定了小层划分对比方案,并在此基础上对沉积微相特征、测井二次解释、储层非均质性进行了详细的研究,最后利用三维地质建模技术完成临25-1断块馆二上段储层地质模型的建立,并进行了储量复算。经储层对比分析,将临25-1断块馆二上段的储层自上向下划分为I小层和II小层两个小层。在此基础上结合研究区的曲流河区域沉积背景进行沉积相研究,将研究区馆二上段的曲流河沉积自下而上划分为三个亚相:河道充填、河道边缘和泛滥盆地,并进一步划分出四个微相:点坝、天然堤、决口扇和泛滥平原微相,并总结出各微相在剖面和平面上的展布特征。利用馆二上段储层参数的解释模型对研究区各井进行二次解释研究,建立了二次解释标准:即当孔隙度20%时,解释为干层;当孔隙度20%,含水饱和度40%时,解释为油层;孔隙度20%,含水饱和度40%,解释为水层。在二次计算的基础上,对研究区馆二上段储层的非均质性进了研究,通过分析确定研究区馆二上段储层属于高孔高渗储层类型,且各小层层间与层内非均质程度中等,而平面非均质性较弱。利用以上有关研究成果,采用储层地质建模技术进行建模,建立了临25-1断块馆二上段地层的构造模型、沉积相模型及储层各属性模型,利用相关模型进行了储量复算,核增29万吨,并确定了开发重点应放在II小层的点坝沉积砂体上,这为以后预测剩余油分布、调整开发方案及改善开发效果提供了地质依据。
[Abstract]:The 25-1 fault block is one of the main oil bearing blocks in the Lulu area of the Lulu oilfield, which has now entered the stage of high water cut development, but there is still great potential for development. In order to further understand the distribution law of the remaining oil and improve the development effect, the stratigraphic contrast scheme in the reservoir of the upper two section of the library is inaccurate and lack of detailed deposition. In the study of microfacies, the results of log interpretation have errors and the reserves are out of control. We need to elaborate the fine description of the two upper reservoirs in the block library. The fine reservoir description of this paper is mainly based on the theory of sedimentology, oil and gas field underground geology, based on core and logging data, and combined with the two blocks of the Linu 25-1 block library. The fine contrast research work of the reservoir is carried out in the regional sedimentary background of the section strata. First, the small layer division and contrast scheme is determined, and on this basis, the characteristics of the sedimentary microfacies, the two interpretation of logging and the reservoir heterogeneity are studied in detail. Finally, the reservoir geological model of the two section of the temporary 25-1 fault block library is completed by the three-dimensional geological modeling technology. The reservoir is divided into two small layers of the I small layer and the II small layer from the upper and lower layers of the 25-1 fault block library. On this basis, the sedimentary facies of the Qu fluhe River region in the study area is studied by the sedimentary facies, and the upper part of the section two of the study district is divided into three from the bottom to three. Subfacies: River filling, river edge and flood basin, and further dividing four microfacies: point dam, natural embankment, crevasse fan and flood plain microfacies, and summarize the distribution characteristics of each micro phase on the profile and plane. Using the interpretation model of reservoir parameters in the upper section of the library two, two interpretations are carried out for each well in the study area, and two solutions have been established. Interpretation standard: when porosity is 20%, it is interpreted as a dry layer; when porosity is 20% and water saturation is 40%, it is interpreted as oil layer; porosity 20% and water saturation 40% are explained as water layers. On the basis of two calculations, the heterogeneity of the reservoir in the upper section of the study area museum two is studied. Through analysis, the reservoir of the upper two of the study area Museum belongs to high porosity and hyperpermeability. The reservoir type, and the heterogeneity of each small layer and layer is moderate, but the plane heterogeneity is weak. Using the relevant research results above, the reservoir geological modeling technology is used to model the structure of the two upper strata of the Linzhou 25-1 block Museum, the sedimentary facies model and the reservoir property model, and the reserves calculation is carried out by the related model. The core of the development should be placed on the sedimentary sand body of the point dam in the II small layer. This provides a geological basis for predicting the remaining oil distribution, adjusting the development plan and improving the development effect in the future, which is determined that the development emphasis should be placed on the sedimentary sand body of the point dam in the II small layer.

【学位授予单位】：中国地质大学(北京)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P618.13

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